Device fob removing shavings in



Sept. 12, 1939. G, FRIES 2,112,734

DEVICE FOR REMOVING SHAVINGS IN SOUND RECORDING MECHANISMS Filed Aug.25, 1 957 unnnunnuuu nnu-unuuuunfl l/we/no Gusmv FRIES Dy:

,4 A ttorneys Patented Sept. 12, 1939 UNITED STATE-S 2,172,734 DEVICEFOR REMOVING SHAVIN GS I IN SOUND RECORDING MECHANISMS Gustav Fries,Cologne, Germany, assignor to Tefi- Apparatebau Dr. Daniel K.G.,Cologne, Germany Application August 25, 1937, Serial No, 160,734

In Germany. Au

gust 28, 1936 3 Claims. (GL 198-214) This invention relates to a devicefor removing the shavings formed in sound recording mechanisms, in whichthe sound recording is effected on the record carrier by the shaving ofthe outer surface thereof to form grooves.

In such mechanisms it is important to remove the shaving formed on thecutting as carefully as possible. Particularly as far as mechanismsemploying endless film bands are concerned on which uninterruptedrecording for some hours is possible, the removal of the shaving isessential for safety in operation, since the shaving easily winds itselfaround all rotating parts and thus gives rise to severe disturbances.

It is known to clear away the shaving by winding it on rollers arrangedlaterally of the film path or on rollers rotating above the sound recordcarrier. In these arrangements the shaving or cutting must, however, befed uninterruptedly to the rollers as, if it once tears, it will notautomatically again be wound on the rollers. Tearing of the shavingcannot be avoided when such rollers are used for the reason that thequantity of shaving arriving at the rollers is always constant, whilethe circumferential speed increases with the amount of the shavingrolled thereon. Furthermore, tearing of the shaving can take place alsofor other reasons, for example with endless film bands at the point ofjunction.

The principal object of this invention is to overcome the abovedisadvantages in a simple and sure manner and to this end, according tothe invention, a worm is provided for taking and removing the shaving,which rotates in a guide tube fitted with internal longitudinal ribs orgrooves. The shaving out from the sound record carrier is seized by theworm and first rolled onto one of the spirals until the latter is filledwith shaving. When the shaving roll has attained a certain thickness, itis forced against the longitudinal ribs of the tube, whereby it isprevented from further rotation. As the worm, however, continues torotate uniformly, longitudinal displacernent of the wound shaving isthen effected within the guide tube, until the shaving finally emergesin uninterrupted sequence from an openlng formed in the tube after themanner of a roll of hair curls.

In order to facilitate longitudinal displacement of the roll of shavingon the Worm, the latter is formed with a pitch and thread depth whichincrease toward the end. In this way the roll is gradually loosened, sothat its longitudinal displacement on the worm is possible without greatexpenditure of force.

In a further embodiment of the invention, teeth are arranged on the partof the worm lying within the area of the inlet opening of the guidetube, which automatically seize and wind the shaving on the worm evenafter it has been torn. The Worm is preferably disposed, together withthe guide tube, closely above the sound record car- By way of example,the invention is illustrated in the accompanying drawing, in whichFigure 1 is a longitudinal section of the shaving clearing device andFig. 2, a cross section thereof.

Referring to the drawing, immediately above the film band l0 serving assound record carrier is arranged transversely to the and the correctspeed.

The shaving clearing device operates in the following manner:

A shaving I3 is cut, during recording, from the a very small distancebeneath the guide tube 2, by the cutting stylus H which is controlled byan electro-acoustic box 12. The shaving I 3, which curls up when out bythe stylus I I, is taken along by the moving film band I0 and thus comesin front of the inlet opening It so large that it enters the grooves l6and is held by the longitudinal ribs 3. The roll of shaving now nolonger rotates, but commences to move forward due to the continuedrotation of the A worm I and is removed. As the pitches of the worm aregreater and deeper towards the end, a loosening of the shaving rollsimultaneously results which greatly assists in the removal thereofwithout the necessity for the use of any great force. The guide tube 2is widened at its continuation beyond the longitudinal ribs 3, wherebythe removed shaving is easily conducted forward by the subsequentbatches until it falls out at the end of the tube in the form of woundcurls I1. v

Obviously the shaving clearer according to the invention is suitable notonly for such recording mechanisms which operate with film bands asdescribed, but also for mechanisms in which sound record plates areemployed or any similar devices in which, during recording, a continuousshaving is produced.

I claim: I g

1. A device for removing thread-like shavings produced during soundrecording, said device comprising a tube having a slot formed thereinfor receiving the shavings, a worm within said tube, means engaging oneend of said worm for rotatably supporting the same, means connected withsaid end of the worm for rotating the worm to cause it to seize shavingsreceived through said slot and feed them along the tube for discharge ata remote point, and a plurality of longitudinal O ribs carried by theinner walls of said tube, the

excess shavings extending into grooves formed between said ribs.

2. A device for removing thread-like shavings produced during soundrecording, said device comprising a tube having a slot formed thereinfor receiving the shavings, a worm within said tube, means engaging oneend of said worm for rotatably supporting the same, means connected withsaid end of the worm for rotating the worm to cause it to seize shavingsreceived through said slot and feed them. along the tube for dischargeat a remote point, the pitch and the thread depth of said wormdecreasing toward said end thereof, and a plurality of longitudinal ribscarried by the inner walls of said tube, the excess shavings extendinginto grooves formed between said ribs.

3. A device for removing thread-like shavings produced during soundrecording, said device comprising a tube having a slot formed thereinfor receiving the shavings, a worm within said tube, teeth carried bythat portion of the worm which is situated opposite said slot, meansengaging one end of said worm for rotatably supporting the same, meansconnected with said end of the worm for rotating the worm to cause it toseize shavings received through said slot and feed them along the tubefor discharge at a remote point, and a plurality of longitudinal ribscarried by the inner walls of said tube, the excess shavings extendinginto grooves formed between said ribs.

GUSTAV FRIES.

